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From Jürgen Schmidt <jogischm...@gmail.com>
Subject Re: [CODE][DISCUSS]: new option to enable ODF 1.2 encryption AES-256
Date Wed, 30 Apr 2014 14:57:51 GMT
On 4/30/14 10:53 AM, Jürgen Schmidt wrote:
> Hi,
> 
> for AOO 3.4 we had already discussed and later on reverted a change to
> enable the ODF Document encryption AES-256 by default.
> 
> Some time ago I played with a new option field to allow the user to
> enable this option as new default, see [1]
> 
> By default the office still uses the old blowfish algorithm but with
> this new option the user can enable the ODF 1.2 encryption. Well it is a
> minimal change to improve the current situation and allow the user to
> make use of what we already have.
> 
> What does it mean in detail when we integrate this change?
> 
> 1. No change as long as this option is not enabled
> 2. Option enabled and ODF 1.2 encryption is now default
> 2.1 New documents stored with password can't be loaded on older office
> versions

-> stored with the new ODF 1.2 encryption

And Oliver pointed out that AOO 3.4 of course is already able to read
such documents


> 2.2 New or existing documents stored in older versions can still be
> loaded in the new office

with the old blowfish encryption

> 2.3 Documents stored in older version (with the old algorithm) and
> loaded in the new office works as expected. Changes made in the document
> and stored with the new office still use the old algorithm and the
> document can later on opened in older office versions.
> 
> From my pov of view there is still room for improvements but it is a
> first useful step to move forward to a more secure algorithm and give
> the user the opportunity to tweak the settings in the preferred way.
> 
> I would like to propose to integrate this change and test it how well it
> works.
> 
> Any opinions? Well keep in mind it is a minimal enhancement to make use
> of what we already have. There is still room for improvements ...
> 
> 
> Juergen
> 
> 
> [1] http://people.apache.org/~jsc/test/encryption_aes256_odf12.png
> 


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